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Issued Debt Instruments and Other Financial Liabilities (Details 1) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]      
Issued debt instruments current $ 2,089,352 $ 856,562  
Issued debt instruments non current 7,411,371 7,258,671  
Issued debt instruments 9,500,723 8,115,233 $ 7,093,653
Other financial liabilities current 226,033 205,871  
Other financial liabilities non current 325 9,529  
Other financial liabilities 226,358 215,400  
Issued debt instruments and other financial liabilities current 2,315,385 1,062,433  
Issued debt instruments and other financial liabilities non current 7,411,696 7,268,200  
Issued debt instruments and other financial liabilities 9,727,081 8,330,633  
Mortgage Finance Bonds [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments current 6,013 6,830  
Issued debt instruments non current 12,489 18,660  
Issued debt instruments 18,502 25,490  
Senior Bonds [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments current 2,078,202 844,898  
Issued debt instruments non current 6,496,011 6,353,967  
Issued debt instruments 8,574,213 7,198,865  
Mortgage Bonds [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments current 5,137 4,833  
Issued debt instruments non current 84,787 90,088  
Issued debt instruments 89,924 94,921  
Subordinated Bonds [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments current 1  
Issued debt instruments non current 818,084 795,956  
Issued debt instruments $ 818,084 $ 795,957